• lakshmi pratury on letter-writing
• lalitesh katragadda: making maps to fight disaster, build economies
• 3 ways to fix a broken news industry
• larry brilliant makes the case for optimism
• larry brilliant wants to stop pandemics
• lawrence lessig: laws that choke creativity
• larry page where's google going next
• larry smith: why you will fail to have a great career
• latif nasser the amazing story of the man who gave us modern pain relief
• latif nasser you have no idea where camels really come from
• latoya ruby frazier a visual history of inequality in industrial america
• laura boushnak: for these women, reading is a daring act
• laura boushnak the deadly legacy of cluster bombs
• laura carstensen: older people are happier
• how (and why) russia hacked the us election
• laura indolfi good news in the fight against pancreatic cancer
• laura robinson the secrets i find on the mysterious ocean floor
• laura schulz the surprisingly logical minds of babies
• laura snyder: the philosophical breakfast club
• laura trice suggests we all say thank you
• how to gain control of your free time
• laurel braitman: depressed dogs, cats with ocd—what animal madness means for us humans
• lauren zalaznick: the conscience of television
• laurie garrett on lessons from the 1918 flu
• laurie santos: a monkey economy as irrational as ours
• lawrence lessig the unstoppable walk to political reform
• lawrence lessig: we the people, and the republic we must reclaim
• leah buechley: how to "sketch" with electronics
• leana wen: what your doctor won't disclose
• lee cronin: making matter come alive
• lee cronin: print your own medicine
• lee hotz: inside an antarctic time machine
• lee mokobe a powerful poem about what it feels like to be transgender
• lee smolin on science and democracy
• leila hoteit 3 lessons on success from an arab businesswoman
• lemn sissay: a child of the state
• lemon andersen performs "please don't take my air jordans"
• lennart green: close-up card magic with a twist
• leonard susskind: my friend richard feynman
• lesley hazleton: on reading the koran
• lesley hazleton the doubt essential to faith
• leslie morgan steiner: why domestic violence victims don't leave
• leslie t. chang: the voices of china's workers
• lawrence lessig: re-examining the remix
• lewis pugh swims the north pole
• lewis pugh's mind-shifting everest swim
• leyla acaroglu paper beats plastic how to rethink environmental folklore
• leymah gbowee: unlock the intelligence, passion, greatness of girls
• a.j. jacobs how healthy living nearly killed me
• lian pin koh a drone's-eye view of conservation
• lidia yuknavitch the beauty of being a misfit
• lies, damned lies and statistics (about tedtalks)
• linda cliatt-wayman how to fix a broken school lead
• linda hill: how to manage for collective creativity
• linda liukas a delightful way to teach kids about computers
• linus torvalds the mind behind linux
• lisa bu: how books can open your mind
• lisa dyson a forgotten space age technology could change how we grow food
• lisa gansky: the future of business is the "mesh"
• what you can do to prevent alzheimer's
• lisa harouni: a primer on 3d printing
• lisa kristine: photos that bear witness to modern slavery
• lisa margonelli: the political chemistry of oil
• lisa nip how humans could evolve to survive in space
• liu bolin: the invisible man
• liz coleman's call to reinvent liberal arts education
• liz diller: a giant bubble for debate
• liz diller plays with architecture
• liza donnelly: drawing on humor for change
• lord nicholas stern: the state of the climate—and what we might do about it
• loretta napoleoni: the intricate economics of terrorism
• lorrie faith cranor: what's wrong with your pa$$w0rd?
• louie schwartzberg hidden miracles of the natural world
• louie schwartzberg: nature. beauty. gratitude.
• louie schwartzberg the hidden beauty of pollination
• louise leakey digs for humanity's origins
• luca turin on the science of scent
• lucianne walkowicz: finding planets around other stars
• lucianne walkowicz let's not use mars as a backup planet
• lucien engelen: crowdsource your health
• what makes life worth living in the face of death
• lucy mcrae: how can technology transform the human body?
• ludwick marishane: a bath without water
• luis von ahn: massive-scale online collaboration
• luke syson how i learned to stop worrying and love useless art
• don't feel sorry for refugees—believe in them
• what i learned from 2,000 obituaries
• lz granderson: the myth of the gay agenda